Host and electronic vaporization device

ABSTRACT

A host for use in combination with a vaporizer includes: a housing assembly; a protective cover; a first drive part; and a second drive part. The first drive part is rotatably connected to the housing assembly and drives the second drive part to slide relative to the housing assembly. The housing assembly includes an opening. The second drive part is engaged with the first drive part and carries the vaporizer. Upon the first drive part driving the protective cover to open or close the opening, the second drive part drives the vaporizer to extend out of the housing assembly or retract within the housing assembly through the opening.

CROSS-REFERENCE TO PRIOR APPLICATION

Priority is claimed to Chinese Patent Application No. CN 202121072340.7, filed on May 19, 2021, the entire disclosure of which is hereby incorporated by reference herein.

FIELD

The present application relates to the field of electronic vaporization technologies, and in particular, to a host and an electronic vaporization device including the host.

BACKGROUND

An electronic vaporization device includes a power supply assembly and a vaporizer. The power supply assembly supplies power to the vaporizer, and the vaporizer converts electrical energy into heat, so that a vaporization medium in the vaporizer absorbs the heat for vaporization to form vapor that can be inhaled by a user. For a traditional electronic vaporization device, a suction nozzle of a vaporizer is usually exposed. When the electronic vaporization device is out of use, pollutants such as external dust or droplets adhere to the suction nozzle and cause pollution to the suction nozzle, resulting in the pollutants on the suction nozzle being absorbed by the user during subsequent inhalation by the user. In view of the impact of pollutants on the health of users, the traditional electronic vaporization device inevitably has the defect of low use safety.

SUMMARY

In an embodiment, the present invention provides a host for use in combination with a vaporizer, the host comprising: a housing assembly; a protective cover; a first drive part; and a second drive part, wherein the first drive part is rotatably connected to the housing assembly and is configured to drive the second drive part to slide relative to the housing assembly, the housing assembly comprises an opening, and the second drive part is engaged with the first drive part and is configured to carry the vaporizer, and wherein, upon the first drive part driving the protective cover to open or close the opening, the second drive part is configured to drive the vaporizer to extend out of the housing assembly or retract within the housing assembly through the opening.

BRIEF DESCRIPTION OF THE DRAWINGS

Subject matter of the present disclosure will be described in even greater detail below based on the exemplary figures. All features described and/or illustrated herein can be used alone or combined in different combinations. The features and advantages of various embodiments will become apparent by reading the following detailed description with reference to the attached drawings, which illustrate the following:

FIG. 1 is a three-dimensional view of an electronic vaporization device according to an embodiment when a vaporizer is retracted into a housing assembly;

FIG. 2 is a three-dimensional schematic cross-sectional structural diagram of the electronic vaporization device shown in FIG. 1;

FIG. 3 is a schematic diagram of a first exemplary exploded structure of the electronic vaporization device shown in FIG. 1;

FIG. 4 is a schematic diagram of a second exemplary exploded structure of the electronic vaporization device shown in FIG. 1;

FIG. 5 is a schematic diagram of a partially exploded structure of the electronic vaporization device shown in FIG. 1;

FIG. 6 is a three-dimensional view of an electronic vaporization device according to an embodiment when the vaporizer extends out of the housing assembly;

FIG. 7 is a three-dimensional schematic cross-sectional structural diagram of the electronic vaporization device shown in FIG. 6;

FIG. 8 is a schematic diagram of a first exemplary exploded structure of the electronic vaporization device shown in FIG. 6;

FIG. 9 is a schematic diagram of a second exemplary exploded structure of the electronic vaporization device shown in FIG. 6;

FIG. 10 is a three-dimensional schematic cross-sectional structural diagram of a sleeve in an electronic vaporization device according to an embodiment;

FIG. 11 is a three-dimensional schematic structural diagram of connection between a vaporizer and a second drive part in an electronic vaporization device according to an embodiment;

FIG. 12 is a three-dimensional schematic structural diagram of FIG. 11 from another viewpoint;

FIG. 13 is a three-dimensional schematic structural diagram of a protective cover in an electronic vaporization device according to an embodiment;

FIG. 14 is a three-dimensional schematic structural diagram of a transmission part in an electronic vaporization device according to an embodiment; and

FIG. 15 is a three-dimensional schematic structural diagram of a cam in an electronic vaporization device according to an embodiment.

DETAILED DESCRIPTION

In an embodiment, the present invention improves the use safety of a vaporizer.

In an embodiment, the present invention provides a host, configured to be used in combination with a vaporizer, the host including a housing assembly, a protective cover, a first drive part, and a second drive part, where the first drive part is rotatably connected to the housing assembly and drives the second drive part to slide relative to the housing assembly, the housing assembly is provided with an opening, and the second drive part is engaged with the first drive part and is configured to carry the vaporizer; and in a process in which the first drive part drives the protective cover to open or close the opening, the second drive part drives the vaporizer to extend out of the housing assembly or retract within the housing assembly through the opening.

In an embodiment, the first drive part is a sleeve provided with a helical groove on an inner wall surface of the host, and an outer wall surface of the second drive part has a helical protrusion engaged with the helical groove.

In an embodiment, the outer wall surface includes a first unit surface, the first unit surface occupies an angle of less than 360° on a circumference of the second drive part, and the helical protrusion is located on the first unit surface.

In an embodiment, the sleeve includes a body portion and a convex ring portion, the convex ring portion is connected to an outer side surface of the body portion and protrudes relative to the outer side surface, the housing assembly includes an upper housing and a lower housing, the opening is located at the upper housing, and the upper housing and the lower housing are disposed on the body portion and respectively abut against two opposite ends of the convex ring portion.

In an embodiment, the host further includes a mounting plate, a cam, and a transmission assembly, where the mounting plate is located within the housing assembly and provided with a through hole corresponding to the opening, the sleeve is provided with a sinking groove on an end surface facing the mounting plate, the cam is rotatably connected to the mounting plate, and when the sleeve rotates and slides the cam into or out of the sinking groove to abut against the end surface, the cam drives the protective cover to close or open the through hole through the transmission assembly.

In an embodiment, the transmission assembly includes a transmission part, a first spring, and a second spring, the first spring is connected between the transmission part and the mounting plate, the second spring is connected between the protective cover and the mounting plate, and the transmission part is slidably disposed on the mounting plate and presses against the cam and the protective cover simultaneously.

In an embodiment, the transmission part is provided with a slot, the protective cover includes a covering portion, a rotating portion, and a pressing portion, the rotating portion is rotatably disposed on the mounting plate and connected between the covering portion and the pressing portion, the second spring is connected to the covering portion, and the pressing portion matches with the slot.

In an embodiment, the transmission part has a first slop, the cam has a second slop pressing against the first slop, and the first slop inclines by a set angle relative to an axial direction of the sleeve.

In an embodiment, the sleeve has a first plane and a first arc surface that define a boundary of the sinking groove, the cam has a second plane and a second arc surface, the first plane extends along an axial direction of the sleeve and presses against the second plane, and the first arc surface is slidable along the second arc surface.

In an embodiment, the host includes any of the following options:

the first driving part is provided with a limiting groove, the housing assembly is provided with a limiting bump, and the limiting bump matches with the limiting groove when the protective cover opens the opening; and

the housing assembly includes a bracket at least partially accommodated in the first drive part, the bracket is provided with a chute, a positioning hole is provided in the chute, the second drive part includes a guide portion and a positioning boss disposed on the guide portion, the guide portion slidably matches with the chute, and the positioning boss is configured to match with the positioning hole to define an ultimate sliding position of the second drive part;

and further includes a flexible circuit board and a motherboard located in the housing assembly, where one end of the flexible circuit board is electrically connected to the motherboard, and one end of the flexible circuit board is configured to be electrically connected to the vaporizer.

One technical effect of an embodiment of the present application is that when a user stops the use, the first drive part can drive the second drive part to retract the vaporizer into the housing assembly, and the protective cover closes the opening, which prevents pollutants such as external dust and liquid from polluting the vaporizer and avoids the user from absorbing the pollutants during subsequent use, thereby improving the use safety of the vaporizer and the entire electronic vaporization device. When the user needs to inhale, the first drive part drives the protective cover to open the opening and simultaneously drives the second drive part to extend the vaporizer out of the housing assembly, so that the use convenience of the electronic vaporization device can be well ensured.

For ease of understanding of the present application, a more comprehensive description of the present application is given below with reference to the accompanying drawings. Exemplary implementations of the present application are given in the accompanying drawings. However, the present application may be implemented in many different forms, and is not limited to the implementations described in this specification. Rather, the purpose of providing these implementations is to provide a more thorough and comprehensive understanding of the disclosure of the present application.

It should be noted that when a component is referred to as “being fixed to” another component, the component may be directly on the other component, or an intervening component may be present. When a component is considered to be “connected to” another component, the component may be directly connected to the another component, or an intervening component may also be present. The terms “inner”, “outer”, “left”, “right”, and similar expressions used in this specification are only for purposes of illustration but not indicating a unique implementation.

Referring to FIG. 1, FIG. 2, FIG. 3, and FIG. 5, an electronic vaporization device 10 provided in an embodiment of the present application includes a vaporizer 20 and a host 30, and the host 30 is configured to supply power to the vaporizer 20. The host 30 includes a second drive part 200, a housing assembly 300, a first drive part 400, a protective cover 500, a mounting plate 600, a transmission assembly 700, and a cam 800.

Referring to FIG. 2 and FIG. 10, in some embodiments, the first drive part 400 may be a sleeve 401, which may be generally cylindrical. The sleeve 401 includes a body portion 420 and a convex ring portion 410. The convex ring portion 410 is connected to an outer side surface of the body portion 420, so that the convex ring portion 410 is disposed around the body portion. The convex ring portion 410 protrudes to a certain height along a radial direction relative to the body portion 420, and in other words, an outer diameter of the convex ring portion 410 is greater than an outer diameter of the body portion 420. The housing assembly 300 includes an upper housing 310, a lower housing 320, and a bracket 900. The upper housing 310 is sleeved on an upper end of the body portion 420 and abuts against an upper end of the convex ring portion 410. The lower housing 320 is sleeved on a lower end of the body portion 420 and abuts against a lower end of the convex ring portion 410. The convex ring portion 410 abuts between the upper housing 310 and the lower housing 320. When a torque is applied by hands to the convex ring portion 410, the entire sleeve 401 may be driven to rotate relative to the upper housing 310 and the lower housing 320. A helical groove 430 is disposed on an inner wall surface of the sleeve 401, and the helical groove 430 can be wound by 360° relative to a central axis of the sleeve 401.

Referring to FIG. 4 and FIG. 9, the mounting plate 600, the transmission assembly 700, and the cam 800 can all be accommodated in a space enclosed by the upper housing 310. The mounting plate 600 can be fixedly connected to the upper housing 310. The upper housing 310 is provided with a via, and an end portion of the via forms an opening 311 on an outer surface of the upper housing 310. The mounting plate 600 is provided with a through hole 610, and the through hole 610 may be disposed coaxially with the via to communicate with each other. The sleeve 401 is located below the mounting plate 600. The body portion 420 is recessed downward toward an end surface 421 (an upper end surface) of the mounting plate 600 to form a sinking groove 422. The body portion 420 has a first plane 423 and a first arc surface 424 that define a boundary of the sinking groove 422. The first plane 423 extends along an axial direction of the sleeve 401, so that the first plane 423 is a plane vertically disposed. The first arc surface 424 may be a circular arc surface, and a circular center angle corresponding to the circular arc surface may be 90° or the like. A limiting groove 440 is further disposed on a side peripheral surface of the body portion 420, and the limiting groove 440 extends in a vertical direction. A limiting bump is disposed on the upper housing 310. When the sleeve 401 rotates relative to the upper housing 310, the limiting bump can slide into or out of the limiting groove 440. The bracket 900 is accommodated in a space enclosed by the sleeve 401, the upper housing 310, and the lower housing 320. An upper end of the bracket 900 is fixedly connected to the mounting plate 600, and a lower end of the bracket 900 is fixedly connected to the lower housing 320, so that the bracket 900, the mounting plate 600, and the entire housing assembly 300 are fixedly connected to form a single unit.

Referring to FIG. 4 and FIG. 15, the cam 800 is rotatably connected to the mounting plate 600 through a rotating shaft. The rotating shaft extends in a horizontal direction, thereby enabling the cam 800 to rotate in a vertical plane relative to the mounting plate 600. When the sleeve 401 rotates, the cam 800 may slide into the sinking groove 422 of the sleeve 401, or may slide out of the sinking groove 422 of the sleeve 401 to abut against the end surface 421. For example, the cam 800 has a second plane 810 and a second arc surface 820. The second plane 810 and the first plane 423 match in shape, and the two can be attached to abut against each other. The second arc surface 820 and the first arc surface 424 match in shape, and the second arc surface 820 can slide on the first arc surface 424. Specifically, when the first plane 423 and the second plane 810 abut against each other, rotation of the sleeve 401 relative to the housing assembly 300 in a particular direction may be prevented. For example, in this case, the sleeve 401 can only rotate clockwise and cannot rotate counterclockwise, when the sleeve 401 rotates clockwise by a set angle, the second arc surface 820 gradually slides away from the first arc surface 424 until the second arc surface 820 abuts against the end surface 421 of the body portion 420. In the process of alternating the abutting of the second arc surface 820 against both the first arc surface 424 and the end surface 421, the cam 800 produces rotation at a certain angle relative to the mounting plate 600. For example, when the cam 800 moves from the first arc surface 424 to the end surface 421, the cam 800 rotates upward, and instead, when the cam 800 moves from the end surface 421 to the first arc surface 424, the cam 800 rotates downward.

Referring to FIG. 4, FIG. 13, and FIG. 14, in some embodiments, the transmission assembly 700 includes a first spring 710, a second spring 720, and a transmission part 730. The transmission part 730 is slidably disposed on a surface (an upper surface) of the mounting plate 600 facing away from the sleeve 401. The first spring 710 may be generally in a shape of a circular arc, one end of the first spring 710 is fixed to the mounting plate 600, and the other end of the first spring 710 is fixed to the transmission part 730. The transmission part 730 is provided with a first slop 731, the first slop 731 inclines by a certain angle relative to an axial direction of the sleeve 401, that is, the first slop 731 is a non-vertical plane. The cam 800 has a second slop 830, the second slop 830 and the first slop 731 match in shape, and the two can be attached to each other to generate a pressing force. The second slop 830 may slide along the first slop 731 during rotation of the cam 800 relative to the mounting plate 600.

The protective cover 500 includes a covering portion 510, a rotating portion 520, and a pressing portion 530. The covering portion 510 occupies the largest area, and the rotating portion 520 is connected between the covering portion 510 and the pressing portion 530, that is, the rotating portion 520 is centrally disposed. The protective cover 500 can be manufactured in an integrally formed manner. The rotating portion 520 is rotatably connected to the mounting plate 600 through a rotating shaft. The rotating shaft extends in a vertical direction, so that the entire protective cover 500 rotates within a horizontal plane. One end of the second spring 720 is fixed to the mounting plate 600, and the other end of the second spring 720 is fixed to the rotating portion 520. The transmission part 730 is further provided with a slot 732, and the pressing portion 530 is accommodated in the slot 732, so that the pressing portion 530 abuts against side walls of the slot 732 to apply a pressing force to the entire transmission part 730, while the slot 732 exerts a limiting action on the motion of the pressing portion 530 to prevent the pressing portion 530 from being detached from the slot 732 and failing to abut against the transmission part 730.

Referring to FIG. 1 to FIG. 4, when the cam 800 matches with the sinking groove 422 on the sleeve 401, the covering portion 510 is at a first position 11 where the covering portion 510 simultaneously acts as a closure for both the opening 311 and the through hole 610. Referring to FIG. 6 to FIG. 9, when a torque is applied to the convex ring portion 410 to drive the sleeve 401 to rotate clockwise, the second arc surface 820 of the cam 800 slides relative to the first arc surface 424 and is gradually detached from the first arc surface 424. In the process in which the second slop 830 slides relative to the first slop 731, the cam 800 gradually rotates upward and drives the second slop 830 to move upward relative to the first slop 731, so that the cam 800 applies a pressing force to the transmission part 730, causing the transmission part 730 to slide relative to the mounting plate 600 and squeeze the first spring 710, and the first spring 710 stores energy. Meanwhile, the transmission part 730 sliding relative to the mounting plate 600 applies an action force on the pressing portion 530, so that the protective cover 500 rotates clockwise, causing the covering portion 510 to gradually open the through hole 610 and the opening 311, and in this case, the second spring 720 is stretched to store energy. When the second arc surface 820 of the cam 800 completely slides away from the first arc surface 424 and abuts against the end surface 421 of the body portion 420, the angle by which the cam 800 rotates upward is maximum, the transmission part 730 overcomes a spring force of the first spring 710 to slide to an ultimate position, and eventually, the covering portion 510 overcomes a spring force of the second spring 720 to rotate clockwise to an ultimate position, so as to completely open the through hole 610 and the opening 311.

In a case that the covering portion 510 is at the first position 11, a torque can be applied to the convex ring portion 410 to drive the sleeve 401 to rotate counterclockwise, so that the second arc surface 820 is detached from the end surface 421 of the body portion 420 and abuts against the first arc surface 424 until the second arc surface 820 matches with the sinking groove 422. In this process, the cam 800 rotates downward, the second slop 830 slides downward relative to the first slop 731, the first spring 710 releases energy to push the transmission part 730 to slide, and the second spring 720 also releases energy to pull the covering portion 510 to rotate counterclockwise, so that the covering portion 510 completely closes the through hole 610 and the opening 311, and in this case, the covering portion 510 is at a second position 12. Thus, the covering portion 510 closes the through hole 610 and the opening 311 at the first position 11, and opens the through hole 610 and the opening 311 at the second position 12.

Referring to FIG. 2, FIG. 11, and FIG. 12, the vaporizer 20 is disposed in the sleeve 401, the vaporizer 20 is configured to vaporize a vaporization medium in the vaporizer 20 into an aerosol that can be inhaled by the user, and the second drive part 200 is fixedly disposed at a bottom of the vaporizer 20. The second drive part 200 is detachably connected to the vaporizer 20, for example, the second drive part 200 is connected to the vaporizer 20 by a screw. The host 30 further includes a motherboard 120 and a flexible circuit board 130. One end of the flexible circuit board 130 is electrically connected to the motherboard 120, and one end of the flexible circuit board 130 is electrically connected to the vaporizer 20. The motherboard 120 can control the operation of the vaporizer 20 through the flexible circuit board 130. The second drive part 200 is generally in a cylindrical structure. There is a helical protrusion 210 on an outer wall surface of the second drive part 200, and the helical protrusion 210 is engaged with a helical groove 430 on an inner wall surface of the sleeve 401. When the sleeve 401 rotates relative to the housing assembly 300, the second drive part 200 and the opposite sleeve 401 can move linearly upward and downward under drive of a transmission action of a screw-pair formed jointly by the helical protrusion 210 and the helical groove 430.

The outer wall surface of the second drive part 200 includes a first unit surface 240 and a second unit surface 250 that are interconnected. The first unit surface 240 occupies an angle of less than 360° in a circumferential direction of the second drive part 200, the helical protrusion 210 is located on the first unit surface 240, and there is no helical protrusion 210 on the second unit surface 250. In other words, the angle by which the helical groove 430 is wound relative to a central axis of the second drive part 200 is less than 360°. This arrangement both ensures that the helical protrusion 210 and the helical groove 430 engage to form a screw-pair, and simplifies the overall structure and volume of the second drive part 200.

When the cam 800 matches with the sinking groove 422, the covering portion 510 is at the first position 11 to close the opening 311 and the through hole 610, and the entire vaporizer 20 is concealed in the housing assembly 300. When the sleeve 401 rotates clockwise, on one hand, the sleeve 401 drives the cam 800 out of the sinking groove 422 to abut against the end surface 421 of the body portion 420, so that the covering portion 510 moves from the first position 11 to the second position 12 to open the through hole 610 and the opening 311; and on the other hand, the sleeve 401 simultaneously drives the second drive part 200 to move upward, so that the vaporizer 20 follows the second drive part 200 to move upward. Because the covering portion 510 has opened the through hole 610 and the opening 311, a suction nozzle 110 at an upper end of the vaporizer 20 may protrude from the opening 311 and be exposed outside the housing assembly 300 for inhalation by the user through the suction nozzle 110. Certainly, when the suction nozzle 110 is exposed outside the housing assembly 300, the limiting bump of the upper housing 310 matches with the limiting groove 440 of the sleeve 401, and when a stuck feeling is generated during matching between the limiting bump and the limiting groove 440, the continued rotation of the sleeve 401 may be stopped.

With the suction nozzle 110 outside the housing assembly 300 and the covering portion 510 at the second position 12, the sleeve 401 can be rotated counterclockwise. In this case, on one hand, the sleeve 401 drives the second drive part 200 to move downward, so that the vaporizer 20 follows the second drive part 200 to move downward to be retracted into the housing assembly 300 via the opening 311 and the through hole 610, and then the suction nozzle 110 of the vaporizer 20 is concealed in the housing assembly 300; on the other hand, simultaneously, the cam 800 is detached from the end surface 421 of the body portion 420 to match with the sinking groove 422 under drive of the sleeve 401, so that the covering portion 510 moves from the second position 12 to the first position 11 to enclose the through hole 610 and the opening 311. Certainly, when the suction nozzle 110 is concealed in the housing assembly 300, the limiting bump of the upper housing 310 is detached from the limiting groove 440 of the sleeve 401.

In the process of the upward and downward motion of the vaporizer 20 relative to the housing assembly 300, in view of a certain flexibility of the flexible circuit board 130, the flexible circuit board 130 can be deformed to adapt to positional changes of the vaporizer 20 relative to the housing assembly 300.

Thus, when the user stops inhaling, the user can rotate the sleeve 401, so that the vaporizer 20 moves downward to be concealed in the housing assembly 300 and the protective cover 500 encloses the opening 311 and the through hole 610, which prevents pollutants such as external dust and liquid from polluting the suction nozzle 110 of the vaporizer 20, and prevents the user from absorbing the pollutants during subsequent inhalation, thereby improving the use safety of the vaporizer 20 and the entire electronic vaporization device 10. When the user needs to inhale, the user can only rotate the sleeve 401, so that the protective cover 500 opens the through hole 610 and the opening 311, and the vaporizer 20 moves upward to expose the suction nozzle 110. Therefore, the use convenience of the electronic vaporization device 10 can also be ensured.

Referring to FIG. 5, in some embodiments, the bracket 900 is provided with a chute 910, a positioning hole 920 is provided in the chute 910, and the chute 910 extends along an axial direction of the sleeve 401. The number of the chutes 910 can be two, the two chutes 910 are provided opposite to each other at intervals, each chute 910 is provided with two positioning holes 920, and the two positioning holes 920 are disposed vertically at intervals along an extension direction of the chute 910. The second drive part 200 includes a guide portion 220 and a positioning boss 230. The number of the guide portions 220 is two, the positioning boss 230 is disposed on an end portion of each guide portion 220, and each guide portion 220 respectively slides to match with a different chute 910. When the guide portion 220 slides relative to the chute 910 to enable a positioning convex bar to match with the positioning hole 920 at a lower end of the chute 910, the second drive part 200 slides downward to the ultimate position, and when the guide portion 220 slides relative to the chute 910 to enable the positioning convex bar to match with the positioning hole 920 at an upper end of the chute 910, the second drive part 200 slides upward to the ultimate position. Therefore, the matching between the chute 910 and the guide portion 220 can improve the accuracy and smoothness of the motion of the second drive part 200 and the vaporizer 20. By the matching between the positioning convex bar and the positioning hole 920, the ultimate position of the upward and downward motion of the entire vaporizer 20 can be defined. It is also possible to indicate that the vaporizer 20 has slid to the corresponding ultimate position through a stuck feeling generated when the positioning convex bar matches with the positioning hole 920.

The technical features in the foregoing embodiments may be randomly combined. For concise description, not all possible combinations of the technical features in the embodiments are described. However, provided that combinations of the technical features do not conflict with each other, the combinations of the technical features are considered as falling within the scope described in this specification.

While the invention has been illustrated and described in detail in the drawings and foregoing description, such illustration and description are to be considered illustrative or exemplary and not restrictive. It will be understood that changes and modifications may be made by those of ordinary skill within the scope of the following claims. In particular, the present invention covers further embodiments with any combination of features from different embodiments described above and below. Additionally, statements made herein characterizing the invention refer to an embodiment of the invention and not necessarily all embodiments.

The terms used in the claims should be construed to have the broadest reasonable interpretation consistent with the foregoing description. For example, the use of the article “a” or “the” in introducing an element should not be interpreted as being exclusive of a plurality of elements. Likewise, the recitation of “or” should be interpreted as being inclusive, such that the recitation of “A or B” is not exclusive of “A and B,” unless it is clear from the context or the foregoing description that only one of A and B is intended. Further, the recitation of “at least one of A, B and C” should be interpreted as one or more of a group of elements consisting of A, B and C, and should not be interpreted as requiring at least one of each of the listed elements A, B and C, regardless of whether A, B and C are related as categories or otherwise. Moreover, the recitation of “A, B and/or C” or “at least one of A, B or C” should be interpreted as including any singular entity from the listed elements, e.g., A, any subset from the listed elements, e.g., A and B, or the entire list of elements A, B and C. 

What is claimed is:
 1. A host for use in combination with a vaporizer, the host comprising: a housing assembly; a protective cover; a first drive part; and a second drive part, wherein the first drive part is rotatably connected to the housing assembly and is configured to drive the second drive part to slide relative to the housing assembly, the housing assembly comprises an opening, and the second drive part is engaged with the first drive part and is configured to carry the vaporizer, and wherein, upon the first drive part driving the protective cover to open or close the opening, the second drive part is configured to drive the vaporizer to extend out of the housing assembly or retract within the housing assembly through the opening.
 2. The host of claim 1, wherein the first drive part comprises a sleeve provided with a helical groove on an inner wall surface of the host, and an outer wall surface of the second drive part comprises a helical protrusion engaged with the helical groove.
 3. The host of claim 2, wherein the outer wall surface comprises a first unit surface, the first unit surface occupies an angle of less than 360° on a circumference of the second drive part, and the helical protrusion is located on the first unit surface.
 4. The host of claim 2, wherein the sleeve comprises a body portion and a convex ring portion, the convex ring portion being connected to an outer side surface of the body portion and protruding relative to the outer side surface, and wherein the housing assembly comprises an upper housing and a lower housing, the opening is located at the upper housing, and the upper housing and the lower housing are disposed on the body portion and respectively abut against two opposite ends of the convex ring portion.
 5. The host of claim 2, further comprising: a mounting plate; a cam; and a transmission assembly, wherein the mounting plate is located within the housing assembly and provided with a through hole corresponding to the opening, wherein the sleeve comprises a sinking groove on an end surface facing the mounting plate, wherein the cam is rotatably connected to the mounting plate, and wherein, upon the sleeve rotating and sliding the cam into or out of the sinking groove to abut against the end surface, the cam is configured to drive the protective cover to close or open the through hole through the transmission assembly.
 6. The host of claim 5, wherein the transmission assembly comprises: a transmission part; a first spring; and a second spring, wherein the first spring is connected between the transmission part and the mounting plate, wherein the second spring is connected between the protective cover and the mounting plate, and wherein the transmission part is slidably disposed on the mounting plate and is configured to press against the cam and the protective cover simultaneously.
 7. The host of claim 6, wherein the transmission part comprises a slot, wherein the protective cover comprises a covering portion, a rotating portion, and a pressing portion, wherein the rotating portion is rotatably disposed on the mounting plate and connected between the covering portion and the pressing portion, wherein the second spring is connected to the covering portion, and wherein the pressing portion matches the slot.
 8. The host of claim 6, wherein the transmission part comprises a first slop, the cam comprises a second slop configured to press against the first slop, and the first slop inclines by a set angle relative to an axial direction of the sleeve.
 9. The host of claim 6, wherein the sleeve comprises a first plane and a first arc surface that define a boundary of the sinking groove, wherein the cam comprises a second plane and a second arc surface, wherein the first plane extends along an axial direction of the sleeve and is configured to press against the second plane, and wherein the first arc surface is slidable along the second arc surface.
 10. The host of claim 1, comprising at least one of: wherein the first driving part comprises a limiting groove, the housing assembly comprises a limiting bump, and the limiting bump matches the limiting groove upon the protective cover opening the opening, wherein the housing assembly comprises a bracket at least partially accommodated in the first drive part, the bracket comprises a chute, the chute comprises a positioning hole, the second drive part comprises a guide portion and a positioning boss disposed on the guide portion, the guide portion slidably matches the chute, and the positioning boss is configured to match the positioning hole to define an ultimate sliding position of the second drive part, wherein the host further comprises a flexible circuit board and a motherboard located in the housing assembly, one end of the flexible circuit board being electrically connected to the motherboard, and an other end of the flexible circuit board being configured to be electrically connected to the vaporizer.
 11. An electronic vaporization device, comprising: a vaporizer; and the host of claim 1, wherein the vaporizer is detachably connected to the second drive part. 